Bicycle frame



FIG. 1 is a perspective view of a bicycle frame showing my new design, it being understood that the broken lines are for illustrative purposes only and on no part of the claimed design;

FIG. 2 is a side elevation view thereof, the opposite side being a mirror image of that shown;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevation view of a bicycle frame showing a second embodiment of my new design, the opposite side being a mirror image of that shown;

FIG. 5 is a top plan view of FIG. 4;

FIG. 6 is a cross-section view taken along line 6--6 in FIGS. 2, 3, 4, 5 and 9;

FIG. 7 is a cross-section view taken along line 7--7 in FIGS. 2, 3, 4, 5 and 9;

FIG. 8 is a cross-section view taken along line 8--8 in FIGS. 2, 3, 4, 8 and 9; and,

FIG. 9 is a bottom plan view of FIGS. 1 and 4. 

The ornamental design for a bicycle frame, as shown and described. 